Farm Raised Catfish

Culture of fish cat to Nigeria: The progress, the Perspectives and the Problems

INTRODUCTION

The fish cats of the Claridae of family understand the fish the most ordinarily cultivated to Nigeria. The growth of aquaculture now principally is raised to Nigeria by a constant increase in the culture of fish cat. Since the culture of Clarias gariepinus by hypophysation was established in Nigeria of the west in 1973, The procedure widely was practiced through Nigeria takes thus to the increase of fish cats closes raised of the 80' s to date. The favorite type of fish cat to Nigeria aquaculture includes: Clarias gariepinus, Heterobranchus bidorsalis, Clarias X Heterobranchus hybrid (Heteroclarias) and Clarias nigrodigitatus. Heterobranchus Sp is the fish more more more ordinarily more cultivated in the parties of east of the south of Nigeria.

PRODUCTION LARVAIRE

Despite the popularity of the fish cat African and its potential big market, the production always is basically to the equal due subsistence major to inadequate availability of seed to stock and nourishes problems. In Europe, about 75% of requests of fingerling of Clarias are furnished by some producers. To Nigeria nevertheless, the fingerlings furnished government and private incubators are not enough to meet the ask fingerling of the farmers of fish cat.

The artificial propagation of C. gariepinus now is executed in the incubators with the hormonal induction. The farmers found the homoplastic the suspension of pituitary gland more inexpensive, practices and more more more extremely more reliable than the hormonal analogous, synthetic and imported ones. The C. gariepinus The weight of broodstock used for student the artificial ranges between 0,3 kg and 2 kg (Olaleye, 2005). Despite the breakthrough with the hormone usage in to clear induced; to fry the survival always is assails with a number of biotique and factors of abiotic. The factors biotiques include cannibalism, the preddation heavy by the frogs/water insects and the factors of abiotic includes temperature of water, oxygen dissolves (>4.5mg/L-1), The ammonia levels. During the first week after the bottom, the factor more critical to care for it successful of the larvae of fish cat is the availability of zooplankton. Nourishes and the nutrition of the larvae, fry and fingerlings of the fish cats the more student and showed to influence the growth and the survival of the fish. The studies revealed that zooplankton in life is the food larvaire favorite. A LOT OF smallholdings the simply posterior larvae to the size of fingerling in the ponds organically fertilized to a density of 30-1000 larvae/m2 (Olaleye, 2005). Fingerlings is stocked in student of the ponds to a rate of 50-75 fish/m3 under the good management.

THE SYSTEME OF CULTURE

Because of the nature cannibalique of Clarias gariepinus, The multiple triage is essential. For exterior student of fried/fingerlings, sort reservoirs with the mosquito nets is recommended preventing dragonfly and the other rapacious insects of student in the ponds. The center culture of Clarias gariepinus And the type of Tilapia is practiced. A center culture of Clarias gariepinus and Oreochromis niloticus, Integrated with the poultry with additional nutrition had been showed to be viable.

NOURISH AND THE NUTRITION

Nourish and nourishing of fish cats in growing outside the ponds maybe the are more informed in the literature. The various efforts were let the crude proteins establish and the condition of amino acid of C. gariepinus. Ayinla (1988) recommended 35% and 40% protein brute (PC) for student of size of table and the brood respectively stock. Of the 10 essential amino acids (EAA) demanded by the type of fish of hot water, only 3 EAAs studied was informed and these are arginnie, methionine and the lysine. To formulate and to compose green blue nourishes that will meet the nutritious conditions of the fish cat to the reasonable cost, several drifts and the conventional and not conventional plant residues were tried to substitute or to replace fishmeal (Postpones 1). The nutrition development moved itself usage of ingredient only, broadcasting the meal of a pelleted to pelleting and in fact the usage to float pelleted nourishes that did a big difference to the development of aquaculture to Nigeria as C. gariepinus Student to the maturity date in 6 months.

The HYBRIDIZATION OF The longifilis of Heterobranchus of x of gariepinus of Clarias

The desires of farmers and of scientists to have a fish cat cultivated that combines the quick traits of growth of Heterobranchus spp and ripening early of the traits of C. gariepinus took to the development of a hybrid one 'Heteroclarias' Spp. The technology widely was accepted as it gave 58% internal rate of return (more infrarouge) on the investment (Adeogun and Al, 1999).

CULTIVATE SYSTEME MODIFICATION

In the magazine of Oresegun and of Al (2007), it was declared that the first farmers of fish students to Nigeria their fish in the pits of terrier, the mined abandoned lands and in the ponds in earth on the system of vast production. The introduction of concrete reservoirs holds the account of the size of manageable pond and the modification of the environment by a flow system by of water and the additional nutrition holding thus the account of the highest yield of fish. The coming of water the interior system re-circulatoire (WRS) advanced in a new perspective for the aquaculture. The introduction of WRS created a turn in the production of fish cat to Nigeria.

THE PERSPECTIVES AND THE PROBLEMES OF CULTURE

The history of aquaculture is at Nigeria essentially the history of culture of fish cat and the hope of provision of fish hangs to Nigeria on his development and his culture. The recent tendencies everywhere in the world, the point to a decline in to land fishings of take, an informer these stocks of fish approached or surpassed even the point of yield viable maximum. The aquaculture remains therefore the alternate only viable for the production of growing fish to meet the need of protein of the people. It was observed that of the on 30.000 MT of type of fish of various water, of fresh water and saumactre took in 2000 of the, the fish cats were more abundant next to Tilapines (Postpones 2). CAM (1993) retrieved that 27.488 MT of fish cats products in 1990 locally were consumed. This implies that there is the always big need for the highest production for the local and markets international.

Postpone 1: Some Residues of Plant Used for the Culture of Clariidae to Nigeria.

Conventional plant feedstuffs

Availability

Fish the type

References

Groundnut cake

Sufficient

C. anguillaris

Salomon and Al. (1996); Eyo &the amplifier; Adelowo (1990)

Cake of seed of soja;

Full big/defatted;

The solvent of Dehulled extracted; the flour of Seed of soja;

Extruded/not has extruded

Sufficient

C. anguillaris

C. gariepinus

C. gariepinus

O'clock. longifilis

Salomon and Al. (1996); Balogun &the amplifier; Ologhobo (1989); Fashakin &the amplifier; Balogun (1996); Adewumi (2005)

Eyo and Al. (2001); Fagbenro &the amplifier; Davis (2003)

Non conventional plant feedstuffs

Availability

Fish the type

References

The envelope of pod of cocoa

Sesame seed

Sufficient

N/a

C. isheriensiss

C. gariepinus

Fagbenro (1992)

Olukunle &the amplifier; Falaye (1998)

Postpone 2: Production of aquaculture to Nigeria

Thunder type

Tilapias, (Oreochromis niloticus), O. niloticus x O. Aureus the crosses) 11,363

Sarotherodon galilaeus, S. melanopleura, T. zilli, T. guinensis 3,025

Fish cats of mud (Clarias gariepinus, C. anguillaris, C.isheriensis) 6,553

Heterobranchus bidorsalis, O'CLOCK. longifilis, Heterobranchus x Clarias The cross 2,832

The fish cat saumactre of water (Chrysicthys nigrodigitatus) 1,515

Grumble (the Common carp, Cyprinus carpio, THE Indian one grumbles; the red fish Carrasus Sp). 1,280

Heterotis (Heterotis niloticus) 654

Rougets (Mugil cephalus, Liza falcipinnis) 336

Snakehead (Parachanna obscrura) 297

The other fish 2,921

Total 30,776

Fagbenro, and Al. (2003)

A number of problems confront the production of fish cat. Eminent among these are: poor competences of direction, the rarity of good seed of quality, the capital lack, the high cost of nourish, the reception of defective data, the lack of consideration of impact on the environment and putting on the market of the products. A lot of persons that currently are engaged in the competence of direction of lack of farming of fish cat. Although there was the work of a lot of research on the production of fish cat nourishes and the nutrition, the usage of feedstuffs inexpensive to replace or to substitute the farmers of fish cat of fishmeal always count on to float it especially costly imported pelleted nourishes.

The success of the industries for the fish cat of chain, the trout rainbow and the salmonids in the WORE is principally had to the availability of systems of pelleted formulated base on the obtained results of the nutritious studies of fish on a lot of years. There is the urgent need for the coordination of such work of research and the nourishes access of the manufacturers to the pertinent data for the quality and comparatively inexpensive nourishes the production.

The partnership of the governments public/deprived Federal/Of THE STATE program initiative and the various private worries that establish standard incubators produce little to few the results to resolve the problem of rarity of seed. Nevertheless, produce the good seed of quality, the aquaculture needs to explore the potential one of genetic one. As to, the more teaching today institutions do not have genetic several laboratories teams where the research can be executed on the production of type of fish cat genetically improved (Omitoyin, 2007).

CONCLUSION

The considerable effort had been devoted to the study and to the production of Clarias and Heterobranchuis spp To Nigeria. The farming of fish cat continued to attract the initiative of private sector in comparison of the preceding public or the programs of subsidized government. If the associated problems of production, especially the problem twin of nourish the provision of production and fingerling is approached, Nigeria will become soon a world-wide exporting one of fish cat.

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